PPT-Physics: Light and Color

Review worksheet 1 A light wave is an electromagnetic wave which has both an electric and magnetic component associated with it Electromagnetic waves are often distinguished from mechanical waves . Chapter 2 UNITS AND MEASUREMENTS 4 hours Unitof measurement System of units SI units undamental and derived units Length mass and time measurements Accuracy and precision of measuring instruments rrors in measurement Significant figures Dimensions Chapter 2 UNITS AND MEASUREMENTS 4 hours Unitof measurement System of units SI units undamental and derived units Length mass and time measurements Accuracy and precision of measuring instruments rrors in measurement Significant figures Dimensions CMSC 435/634. Light. Electromagnetic wave. E & M perpendicular to each other & direction. Photon wavelength . l. , frequency f = c/. l. Visbile. . l. ≈ 380 nm (blue) to 720 nm (red). Photon energy q = h f = h c/. Color. Color and Light. It is our intent and desire to encourage wide dissemination of this material for educational purposes. To allow that, you are hereby granted a license under the copyrights in the material and may freely copy, display, distribute, and publicly perform the materials in whole or in part for educational purposes, provided 1) you continue to include the copyright notice on the materials; 2) you do not use the materials, or parts of them, in a manner which would reasonably be considered to be de con. Light. The Electromagnetic Spectrum. :. E. = . h. n. Light . . Color. When light impinges on a surface, lots of things can happen:. e- of the atoms absorb . some. of the photons. Followed by possible vibrational relaxations in excited states. When Light Strikes an Object. When light strikes an object, the light can be . A. bsorbed (. take it in. ). R. eflected (. bounce off/scatter. ). T. ransmitted (. carrying it/moving it. ). Materials can be classified as. Color. Color is:. A property of light. Visible when light is emitted or reflected. Determined by the wavelength of light. The three properties of color are hue, value and saturation.. Hue. refers to the pure state of a color; it is the name we give a color, such as red or blue.. Nathan Bingham. Meaghan Luther. Sarah Rustin. Ashley Hill. Presented By. Where Did Bad Physics Begin?. Special effects were around before the invention of the camera.. In the 1700’s magicians used techniques to perform optical illusions.. Six sub-departments covering most areas of Physics research. Condensed matter physics. Astrophysics. Atmospheric, oceanic and planetary physics. Atomic and. Laser physics. Particle . physics. Theoretical physics. Medical Physicists. Health care professionals with specialized training in the medical applications of physics.. Specialized in radiation physics, ultrasound, magnetic and electric fields, infra-red and ultraviolet light, heat and lasers in diagnosis and therapy. http://commons.wikimedia.org/wiki/File:Eye-diagram_bg.svg . Light. Light. Particles known as photons. Act as ‘waves’. Two fundamental properties. Amplitude. Wavelength . Frequency is the inverse of wavelength. element of design. 3 dimensions. hue. value. chroma. Hue-. the descriptive name of color . (i.e. red, yellow, & green). pure color w/o black, white, or gray added. defines a specific spot on the color wheel . Why do we see what we see?. Color. The property possessed by an . object. of producing different sensations on the . eye. as a result of the way the object reflects or transmits . light. .. Light. transmission. Light = straight path. . absorbs energy as its electrons. move from a low to a high energy level.. An atom:. emits light when an electron moves from a high to a low energy level..  .  . Learning Goals.